Most Helpful Guy
I usually like brunettes, but there are certainly exceptions.
I think part of the reason why a lot of guys like brunettes now, is because too many girls dye their hair blond so now being blond doesn't stand out so much.
But it's all relative. If guys see you hanging out with a bunch of brunettes, you'll get their attention more. If on the other hand, there's only one brunette in your group, and the rest of you are blond, she'll stand out more.